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Noisy CPU Fan...
on Intel Pentium 4 - 3.4 Gig

 2:50 pm on Mar 30, 2005 (gmt 0)

Hi guys, I just wanted to pick you brains about a small problem I have.

I recently asked a local company to build a Pc for me:

spec P4 3.4gig - asus MB - 1 Gig Ram

The only problem I have is that the original Intel CPU fan gets really noisy when the box heats up - ie after a couple of hours even in idle mode.

Opened the box - cools it down to bareable level - but it's not even summer yet :( and I don't want to run an open box because of the dust.

1st thing I noticed was - no case fan - so went back to see them and he added one fan blowing out at the back. Brought back the box and it hasen't make any difference (it's even worse as the case fan is also kinda noisy.

So what are my options?

Buying a better CPU fan?
Buying more case fans (less noisy of course) - for both intake and exhaust
Asking him to install one of these fancy 'water'-based cooling system?

Any of you experienced a similar pb?

Thanks for the help.




 2:52 pm on Mar 30, 2005 (gmt 0)



 2:57 pm on Mar 30, 2005 (gmt 0)

i have a fanless power supply,

also a high end heat sink with a quality (large) fan (the larger the blades the slowert it has to rotate and the quieter it is)

the stock intel fan is noisy.

my set up is not completely silent but is pretty good.


 3:24 pm on Mar 31, 2005 (gmt 0)

cheers for the link and the info - I've got some reading to do then.



 1:46 am on Apr 1, 2005 (gmt 0)

"you need more fans"
to quote someone from a hardware forum I'm a member of. Anyway make sure your cpu fan has decent CFM (in other words make sure it pushes enough air) If you are having heat problems with an intel chip then something is wrong, they should run fine with a stock heatsink and fan. But if you are, how many case fans do you have? I have 7 myself, I have a friend who has 16 or so. you need intake, and outtake, put an outtake on the back and side of the case if possible, and an intake on the front and


 7:35 am on Apr 1, 2005 (gmt 0)

quality (large) fan

could you tell me which fan you've got?

you need more fan

That's what I gathered after some reading - I need two intake fan bottom front & one (or more) exhaust fan high back.

No particular heat pb - just noisy fan :( according to the asus prob I figure it start getting noisy above 3000 rpms.

Thanks again guys.



 9:08 am on Apr 1, 2005 (gmt 0)

well i'm using a silentmaxx fanless power supply

and a

Swiftech MCX478-V heatsink with Vantec Stealth 92mm fan.

with an intel p4 3gig

no other case fans at all. ...

the fan runs at around 1700-1800 revs and the system is pretty quiet (not totally but very satisfactory) and the system runs nice and cool (according to asus probe temp guage)


 9:22 am on Apr 1, 2005 (gmt 0)

Here's an article about reducing PC noise... from a well known anti-noise charity: link [nonoise.org]

Zalman and other specialist manufacturers make low noise hsf (heat sink and fans). Do some research on hsf, anything lower than 25 db is considered pretty quiet. For case fans .... under 20 db is considered quiet. The article should also point you to other ways you can reduce noise from your PC. You are unlikely to need 16 or even 7 case fans for the system you describe. One or two should do. Intake fans are not necessary in most cases. Air automatically flows in (if you have gaps for it) to replace the hot air being pumped out.


 9:29 am on Apr 1, 2005 (gmt 0)

cheers topr8,

went on their site unfortunatelly they don't seem to have any fan for a 775 socket :(



 9:34 am on Apr 1, 2005 (gmt 0)

The modern smart fans are prety good. They adjust their speed depending on cpu temeperature.



 9:41 am on Apr 1, 2005 (gmt 0)

Zalman sell an adapter that allows you to use 478 hsf on a 775 CPU.


 11:36 pm on Apr 1, 2005 (gmt 0)

oddsod, thanks for the link and zalman info - will have a read through/do some research.



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